MAX_PLUGINOUTPUT_LENGTH

[Goetz Rieger]

Guys,

thanks a lot.

I will leave this define alone...

Cheers,
Goetz


>
> Andreas Ericsson wrote:
>> Goetz Rieger wrote:
>>> Hi all,
>>>
>>> I need a longer maximum plugin output length in Nagios 2.3.1 because I
>>> have a custom plugin which could possibly return quite a lot of data.
>>>
>>> In include/objects.h MAX_PLUGINOUTPUT_LENGTH is set to 332.
>>>
>>> So I have two questions:
>>>
>>> -Is that the correct define to alter the length of a plugin output
>>> read by
>>> Nagios?
>>>
>>
>> Yes.
>>
>>> -Is there any drawback when setting the value rather high, say 1000?
>>>
>>
>> Possibly, but not necessarily. The maximum posix-guaranteed atomic
>> write-size is 512 bytes. If you increase this number you *might* see
>> plugin output getting mixed with output from other plugins. Also, if
>> you do this on a large monitoring installation you will double the
>> risk of filling up the FIFO nagios uses for receiving check-commands,
>> which will cause a build-up of nagios processes that will eventually
>> starve the system of memory.
>>
>
>     By doing, I'd tell you, if you do change this, as I've done, your
> system will starve, ours has.
>
>     []s.
>
>
>



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